Information Technology

Information Technology: Prepare and share IT Interview Questions, Answers, and Tips across various Information Technology stacks and programming languages

  • Why Introspection is used in Java?
    Advanced Java

    Posted By: clemmiebrotherto 12 hours ago

  • What are anonymous classes in PHP7.
    Php 7

    Posted By: Annie 12 hours ago

  • What invokes the thread's run() method ?
    Advanced Java

    Posted By: Poornima 12 hours ago

  • What is Coercive mode in PHP?
    Php 7

    Posted By: Gene 12 hours ago

  • Explian Autoboxing and unboxing conversions in Java
    Core Java

    Posted By: vijay 12 hours ago

  • What is Strict mode in PHP?
    Php 7

    Posted By: Prashant 12 hours ago

  • Why String is immutable in Java?
    Core Java

    Posted By: Smith 12 hours ago

  • What are Array constants?
    Php 7

    Posted By: Dana 12 hours ago

  • Explain the difference between a process and a thread?
    Core Java

    Posted By: Wilber 12 hours ago

  • Explain Spaceship Operator?
    Php 7

    Posted By: Marcel 12 hours ago

  • How to sort a List of Java Bean in Ascending Order?
    Core Java

    Posted By: CarlosBivatte 12 hours ago

  • What is use of random_bytes() in PHP?
    Php 7

    Posted By: EvgeniaAnd 12 hours ago

  • What are the difference between Java arrays and Collections?
    Core Java

    Posted By: Anonymous 12 hours ago

  • List some features of PHP that are deprecated in PHP 7?
    Php 7

    Posted By: Manjiri Kulkarni 12 hours ago

  • How to sort a collection in Java?
    Core Java

    Posted By: Roland 12 hours ago

  • What is use of set_exception_handler() in PHP?
    Php 7

    Posted By: Anonymous 12 hours ago

  • What are wrapper classes?
    Core Java

    Posted By: JesseThick 12 hours ago

  • List some extensions have been removed from PHP 7?
    Php 7

    Posted By: Sol 12 hours ago

  • List few differences between Array list and vector in Java?
    Core Java

    Posted By: Quincy 12 hours ago

  • Why main() method of Java program must be static?
    Core Java

    Posted By: Ella 12 hours ago

  • What are access modifiers in java?
    Core Java

    Posted By: Bruce 12 hours ago

  • How to create immutable class in java?
    Core Java

    Posted By: Gerhard 12 hours ago

  • Give me a real time example of Abstraction?
    Core Java

    Posted By: Caleb 12 hours ago

  • What is the Dictionary class?
    Core Java

    Posted By: Guss 12 hours ago

  • Can you create an instance of interface?
    Core Java

    Posted By: Wood 12 hours ago

  • What is implicit casting in Java?
    Core Java

    Posted By: Ervin 12 hours ago

  • What is JIT ?
    Core Java

    Posted By: Allen 12 hours ago

  • What does System.gc() and Runtime.gc() methods do?
    Advanced Java

    Posted By: Direct Lender Loans 12 hours ago

  • What are Checked and Unchecked exceptions in Java?
    Core Java

    Posted By: Sheldon 12 hours ago

  • What is default access modifier of an Interface in Java?
    Core Java

    Posted By: Fifium App Development 12 hours ago

  • Why to use Iterator in Java? Is it is an Interface or Class?
    Core Java

    Posted By: Glen 12 hours ago

  • What is garbage collector in java?
    Core Java

    Posted By: Curley 12 hours ago

  • What is use of transient keyword in Java?
    Core Java

    Posted By: kato 12 hours ago

  • How to suspend a thread?
    Core Java

    Posted By: Carson 12 hours ago

  • What is deadlock? How can you prevent it, avoid it?
    Core Java

    Posted By: Adolf 12 hours ago

  • What is a NullPointerException?
    Core Java

    Posted By: Jasper 12 hours ago

  • What is the difference between Iterator and Enumeration in Java?
    Core Java

    Posted By: Ora 12 hours ago

  • In how many ways a thread can be created in Java?
    Core Java

    Posted By: Brooks 12 hours ago

  • Explain Stream Tokenizer in Java?
    Core Java

    Posted By: Baldwin 12 hours ago

  • How to convert a string to long in Java?
    Core Java

    Posted By: uqtifanano 12 hours ago

  • How to add and remove nodes in Jtree?
    Core Java

    Posted By: Hans 12 hours ago

  • How do I break out of nested loops in Java?
    Core Java

    Posted By: Cas 12 hours ago

  • How to calculate difference between two dates in Java?
    Core Java

    Posted By: Cyril 12 hours ago

  • What is Double Brace initialization in Java?
    Core Java

    Posted By: Chauncey 12 hours ago

  • Why do we need constructor in Java?
    Core Java

    Posted By: Michel 12 hours ago

  • How many ways you can create an object in java ?
    Advanced Java

    Posted By: Ram Lakhan 12 hours ago

  • How to write custom class Loader ?
    Advanced Java

    Posted By: Kit 12 hours ago

  • Explain the difference between ArrayList and Vector?
    Core Java

    Posted By: Valentine 12 hours ago

  • How to name a thread in executor service ?
    Advanced Java

    Posted By: Raoul 12 hours ago

  • Is there any difference between a = a + b and a += b expressions in Java?
    Core Java

    Posted By: Newton 12 hours ago

  • What are raw types in Java?
    Core Java

    Posted By: Milton 12 hours ago

  • How to check if a file exists or not in Java?
    Core Java

    Posted By: GORU RAVi 12 hours ago

  • How to print nodes of a Binary tree in Java?
    Core Java

    Posted By: Arther 12 hours ago

  • What are Inner classes in Java?
    Core Java

    Posted By: Dipali Sharma 12 hours ago

  • Is 'sizeof' is a keyword or method in Java?
    Core Java

    Posted By: Joseph 12 hours ago

  • Explain What is Connection Pooling?
    Core Java

    Posted By: Wylie 12 hours ago

  • What is the default initialized value of a String in Java.
    Core Java

    Posted By: Father 12 hours ago

  • What is Static binding ?
    Core Java

    Posted By: Rodney 12 hours ago

  • Difference between sleep and suspend ?
    Core Java

    Posted By: MichaeltoX 12 hours ago

  • What is JAR file?
    Core Java

    Posted By: Jonathan 12 hours ago

  • What is super in Java?
    Core Java

    Posted By: Ethan 12 hours ago

  • What is classloader in Java?
    Core Java

    Posted By: Clay 12 hours ago

  • What is difference between final, finally and finalize?
    Core Java

    Posted By: Sterling 12 hours ago

  • What is Externalizable?
    Core Java

    Posted By: Wilfred 12 hours ago

  • What is the difference between JVM and JRE?
    Core Java

    Posted By: Bennett 12 hours ago

  • How to interrupt a thread explicitly ?
    Core Java

    Posted By: Willie 12 hours ago

  • What is difference between DTO, VO, POJO, JavaBeans?
    Advanced Java

    Posted By: Art 12 hours ago

  • How to use JNDI is used in JMS?
    Advanced Java

    Posted By: Stuart 12 hours ago

  • List the types of data passing mechanisms?
    Advanced Java

    Posted By: Claudiuslest 12 hours ago

  • How to implement RMI in Java
    Advanced Java

    Posted By: bharadwaja 12 hours ago

  • What is the use of Semaphore?
    Advanced Java

    Posted By: Patricksic 12 hours ago

  • What is difference between core Java and Java EE?
    Core Java

    Posted By: Dan 12 hours ago

  • What is runnable?
    Core Java

    Posted By: Charlie Pan 12 hours ago

  • What is thread deadlock? How to resolve thread?
    Advanced Java

    Posted By: Carson 12 hours ago

  • What is the difference between a StringBuffer and String in Java?
    Core Java

    Posted By: Bert 12 hours ago

  • Describe the differences between C++ and Java.
    Core Java

    Posted By: Ambers 12 hours ago

  • What is difference between Abstract and final?
    Core Java

    Posted By: akshay anand 12 hours ago

  • Why java doesn't support multiple inheritance?
    Core Java

    Posted By: Obed 12 hours ago

  • How would you design a garbage collector?
    Core Java

    Posted By: Rajat 12 hours ago

  • Does Java support pointer variables?
    Core Java

    Posted By: AnHo 12 hours ago

  • How to implement multithreading in Java?
    Core Java

    Posted By: Robertrof 12 hours ago

  • What is difference between JVM and JRE?
    Core Java

    Posted By: Alvah 12 hours ago

  • What is difference between call by value and call by reference?
    Core Java

    Posted By: Charlie 12 hours ago

  • Explain final, finally, finalize difference
    Core Java

    Posted By: Raymond 12 hours ago

  • What is the difference between JDK and JVM?
    Core Java

    Posted By: Guadalupe 12 hours ago

  • What is overloading and overriding in java?
    Core Java

    Posted By: Daisy 12 hours ago

  • What is Enum in Java?
    Core Java

    Posted By: kato 12 hours ago

  • What is instanceof keyword?
    Core Java

    Posted By: Burl 12 hours ago

  • What is the final method?
    Core Java

    Posted By: Anonymous 12 hours ago

  • What is the final blank variable?
    Advanced Java

    Posted By: SamanthaDar 12 hours ago

  • What is a transient variable?
    Advanced Java

    Posted By: Larkin 12 hours ago

  • When a thread blocks on I/O, in which state it enters?
    Advanced Java

    Posted By: Addie 12 hours ago

  • What is the use of % operator?
    Advanced Java

    Posted By: kumar1975 12 hours ago

  • What is an immutable class?
    Advanced Java

    Posted By: Leander 12 hours ago

  • What is difference between HashMap and HashTable?
    Advanced Java

    Posted By: Stacy 12 hours ago

  • What is use of intern() method in Java?
    Advanced Java

    Posted By: Crawford 12 hours ago

  • What is JCA and JPA in java?
    Advanced Java

    Posted By: atul 12 hours ago

  • What is OutOfMemoryError in Java? How do you deal with that?
    Advanced Java

    Posted By: Nathan 12 hours ago

  • What is the maximum Heap Size of 32 bit or 64-bit JVM in Windows and Linux?
    Advanced Java

    Posted By: Delbert 12 hours ago

  • What is the difference between JDBC and JNDI?
    Advanced Java

    Posted By: Anonymous 12 hours ago

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