DSQ Placement Paper - Technical Questions

DSQ Previous Years Solved Sample Placement Papers

1. How can a Servlet call a JSP error page?
   

   (a) This capability is not supported.

   (b) When the servlet throws the exception, it will automatically be caught by the calling JSP page.

   (c) The servlet needs to forward the request to the specific error page URL. The exception is passed along as an attribute named "javax.servlet.jsp.jspException". (Ans)

   (d) The servlet needs to redirect the response to the specific error page, saving the exception off in a cookie.

2. What is the key difference between using a `` and HttpServletResponse.sendRedirect()?
   

   (a) forward executes on the client while sendRedirect() executes on the server.

   (b) forward executes on the server while sendRedirect() executes on the client. (Ans)

   (c) The two methods perform identically.

3. Why are beans used in J2EE architecture instead of writing all the code in JSPs?
   

   (a) Allows separation of roles between web developers and application developers (Ans)

   (b) Allows integration with Content Management tools

4. Which method is called first each time a Servlet is invoked?
   

   (a) Start()

   (b) Run()

   (c) Service()

   (d) Init() (Ans)

5. Which of the following is true?
   

   (a) Unlimited data transfer can be done using POST method (Ans)

   (b) Data is visible in Browser URL when using POST method

   (c) When large amounts of data transfer is to be done, GET method is used

6. In negative feedback, the return ratio is ___________:
   

   (a) 0

   (b) 1

   (c) greater than 0

   (d) greater than 1

   (Ans: C)

   Explanation: In a negative feedback circuit, the return ratio will always be in the range of 0 to 1.

7. A phase shift oscillator uses __________________:
   

   (a) LC tuning

   (b) Piezoelectric crystal

   (c) Balanced bridge

   (d) Variable frequency operation

   (Ans: C)
8. Transistor is a:
   

   (a) Current controlled current device

   (b) Current controlled voltage device

   (c) Voltage controlled current device

   (d) Voltage controlled voltage device

   (Ans: A)

   Explanation: The output current depends on the input current.

9. A bistable multivibrator is a:
   

   (a) Free running oscillator

   (b) Triggered oscillator

   (c) Saw tooth wave generator

   (d) Crystal oscillator

   (Ans: B)
10. Which number is divisible by -1?
    

    (a) 13

    (b) 31 (Ans)

    (c) 5

    (d) None of these

11. From the alternatives, choose the one which correctly classifies the four sentences as Fact (F), Judgment (J), or Inference (I).
    (a) The minister definitely took the wrong step.
    (b) Under the circumstances, he had many other alternatives.
    (c) The prime minister is embarrassed due to the minister�s decision.
    (d) If he has put the government in jeopardy, the minister must resign.
    

    (a) JFFI (Ans)

    (b) IFJI

    (c) FFJI

    (d) IFIJ

12. What is the number x?
    I. The LCM of x and 18 is 36.
    II. The HCF of x and 18 is 2.
    

    (a) 1

    (b) 2

    (c) 3 (Ans)

    (d) 4

13. Little Beau Peep lost her sheep. She could not remember how many were there. She knew she would have 400 more next year than the number of sheep she had last year. How many sheep were there?
    I. The number of sheep last year was 20% more than the year before that and this simple rate of increase continues to be the same for the next 10 years.
    II. The increase is compounded annually.
    

    (a) 1

    (b) 2

    (c) 3 (Ans)

    (d) 4