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| Interview Questions and Answers for 'Qualcomm' - 3 question(s) found - Order By Rating | ||||
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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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 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 ? | ||||
| What are different ways to create String Object? Explain. | ||||
| Why Char array is preferred over String for storing password? | ||||
| Does garbage collection guarantee that a program will not run out of memory? | ||||
| What is the difference between Encapsulation and Abstraction? | ||||
 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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Discuss Correct / Improve java string comparison string object class == equals object equality operator == vs equals equals vs == Asked in 294 Companies  basic  frequent | ||||
 Try 6 Question(s) Test | ||||
| 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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| 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 ? | ||||
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| Can we make array volatile in Java ? | ||||
| Have you heard of volatile Table in Teradata ? | ||||
| what is volatile and atomic | ||||
