CBSE class XI Computer Science sample paper2

www.cbseguess.com -------------------------------------------------------------------------------------------------------------------www.cbseguess.com Other Educational Portals www.icseguess.com | www.ignouguess.com | www.dulife.com | www.magicsense.com Computer Science Unit Test – 1 Class : XI =================================================== Time Duration : 1 Hour Maximum Marks: 25 =================================================== Instructions: (i) All Questions are compulsory. (ii) Write Neat and Clean. =================================================== Q.1 Differentiate between the following (a) Data and Information (b) Application Software and System Software (c) DIR and TREE command (d) COPY and XCOPY command (e) Internal and External Commands (5) Q.2 Define the following commands with Syntax and Example (a) SYS (b) DIR (c) DISKCOMP (d) Redirection operations (e) FORMAT (5) Q.3 (a) What do you mean by booting? Which are the files required for it? (b) Define the components of Computer System with diagrammatic representation. (5) Q.4 (a) What is the difference between the following (i) CD (ii) CD C:\XYZ (1) (b) What is the size and range of Long and Float datatype. (1) (c) What is keyword and Literal. Explain with example. (1) (d) What will be the output of the following program : #include #include void main() { clrscr(); int I,J,total=0; cout<<”Enter the Value of I : “; cin>>I; cout<<”Enter the Value of J :”; www.cbseguess.com -------------------------------------------------------------------------------------------------------------------www.cbseguess.com Other Educational Portals www.icseguess.com | www.ignouguess.com | www.dulife.com | www.magicsense.com cin>>J; total=(I*J)+3+(I+J); cout<<”Total of Expression : “<