Technical Questions asked in HCL Technologies

Technical section forms an important component of placement tests of most IT companies. In HCL written test, technical questions are asked in the section called 'Computer Fundamentals'. These questions are drawn from the basic knowledge of computer systems, data structures, networking, programming languages, DBMS, etc. Here are some sample questions for HCL technical section:

1. Which of the following is not an OOP languages?
   1. C
   2. C++
   3. java
   4. COOL
   Answer & Explanation
   Answer: Option A.
   C is not an object oriented language

2. using in C++ is for
   1. using does not exist in C++
   2. used for library functions
   3. using is a literal in C++
   4. used for pointers
   Answer & Explanation
   Answer:  Option B.
   Note : it is also used often for namespaces.
3. Which statements are use to UNLOCK the user?
   1. Alter user Scott account lock;
   2. Modified user Scott account unlock;
   3. Alter user Scott account unlock;
   4. Alter user Scott unlock;
   Answer & Explanation
   Answer: Option C.

4. NULL is
   1. the same as 0 for integer
   2. the same as blank for character
   3. the same as 0 for integer and blank for character
   4. not a value
   Answer & Explanation
   Answer: Option D.
5. Drawbacks of file processing system
   1. data redundancy
   2. Limited data sharing
   3. lack of security
   4. all of the above
   Answer & Explanation
   Answer: Option D.
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6. Which of the following allows function overloading in C++?
   1. type
   2. number of arguments
   3. both of above
   4. none of these
   Answer & Explanation
   Answer: Option C.
   Both type and number of arguments can be overloaded.