Class 9 Computer Unit 2 exercise | national book foundation class 9 computer |Presentation nation
This video is about class 9 computer chapter 2 long questions/ answers, class 9 computer new book national foundation for federal board students. computer class 9 chapter 2 long question/ answers (1 to 5) in this video I provide the answers of short question of chapter 2 Question no 1: Identify whether the given problems are Decision Problem, Counting Problem or Search Problem. Write your answer in front of each problem given below:
a) Does a given binary string have an even number of zeros?
b) Flipping a coin result in Head or tails. I flip a coin 20 times, how many different sequences of head and tails are possible?
c) Does a certain Java program say “yes” to an empty input?
d) How many ways can the letters of the word TRIANGLE be arranged?
e) N-queen problem: where the goal is to place eight queens on a chessboard such that no queen attacks any other.
Question 2: A student has to take one course of physics, one of science and one of mathematics. He may choose one of 3 physics courses(P1, P2,P3), one of 2 science courses (S1, S2) and one of 2 mathematics courses (M1, M2). In how many ways can this student select the 3 courses has to take?
Question 3: Create an IPO chart which will accept the ages of four boys and calculate their total age and average age. The program must display both the total age and the average age.
Question 4: Create and IPO chart of a scenario that allows a user to enter in two numbers. The operation to be performed is either addition, subtraction, multiplication or division and accordingly the output should be given to the user.
Question 5: The child wants to plan a birthday party for their friend.
a) Draw an IPO chart of this situation.
b) Write down properties on computation thinking.
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