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Interview Questions and Answers for 'Qualcomm' - 3 question(s) found - Order By Newest | ||||
Very frequently asked. Among first few questions in almost all interviews. Among Top 5 frequently asked questions. Frequently asked in Indian service companies (HCL,TCS,Infosys,Capgemini etc based on multiple feedback ) and Epam Systems | ||||
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Ans. "equals" is the method of object class which is supposed to be overridden to check object equality, whereas "==" operator evaluate to see if the object handlers on the left and right are pointing to the same object in memory. x.equals(y) means the references x and y are holding objects that are equal. x==y means that the references x and y have same object. Sample code: String x = new String("str"); String y = new String("str"); System.out.println(x == y); // prints false System.out.println(x.equals(y)); // prints true | ||||
Sample Code for equals | ||||
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Like Discuss Correct / Improve  java   string comparison   string   object class   ==   equals   object equality  operator   == vs equals   equals vs == Asked in 294 Companies basic   frequent | ||||
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Related Questions | ||||
What is the difference between = and == in Java ? | ||||
How is == operator different for objects and primitive types ? | ||||
What will be the output of following code Integer x = 1; Integer y = 2; System.out.println(x == y); What if you change 1 to "1" and Integer to String? | ||||
Frequently asked question for intermediate developers. Frequently asked in HCL Technologies and EPAM. | ||||
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Ans. Volatile is a declaration that a variable can be accessed by multiple threads and hence shouldnt be cached. | ||||
Sample Code for volatile | ||||
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Like Discuss Correct / Improve  java   oops   synchronization   volatile   java keywords Asked in 42 Companies intermediate   frequent | ||||
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Related Questions | ||||
How does volatile affect code optimization by compiler? | ||||
how is the internal code for the "volatile" implemented ? | ||||
What are the different ways to avoid multi Threading related problems in Java ? | ||||
Can we make array volatile in Java ? | ||||
Have you heard of volatile Table in Teradata ? | ||||
what is volatile and atomic | ||||
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Ans. Priority inversion is a problematic scenario in scheduling in which a high priority task is indirectly preempted by a lower priority task effectively inverting the relative priorities of the two tasks. | ||||
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Like Discuss Correct / Improve   Asked in 5 Companies | ||||
Related Questions | ||||
Difference between == and .equals() ? | ||||
Why is String immutable in Java ? | ||||
Explain the scenerios to choose between String , StringBuilder and StringBuffer ? or What is the difference between String , StringBuilder and StringBuffer ? | ||||
What are the difference between composition and inheritance in Java? | ||||
Explain OOPs or Explain OOPs Principles or Explain OOPs Concepts or Explain OOPs features or Tell me something about OOPs | ||||
What is a Lambda Expression ? What's its use ? | ||||
Does garbage collection guarantee that a program will not run out of memory? | ||||
Why Char array is preferred over String for storing password? | ||||
What are different ways to create String Object? Explain. | ||||
What is the difference between final, finally and finalize() ? | ||||