DOEACC NIELIT O Level A1 R3 January 2009 Question Answer Sample Model Paper Solutions
DOEACC NIELIT O Level A1 R3 January 2009 Question Answer Sample Model Paper Solutions : NIELIT DOEACC O Level A1 R4 (R3) Previous Year Question Paper With and And Solution Available this Post,
SOLUTIONS JANUARY, 2009
PART ONE
MULTIPLE CHOICE
Ans. 1.
1.1 (C) MICR is magnetic ink character reader used to read data writeen in magnetic ink on cheques, drafts etc.
1.2(B) Random Access Memory is volatile memory which looses its data as soon as power supply is switched off.
1.3(A) A folder is used to store subfolders and files in an organized manner on a disk.
1.4(C) Operating system is a system software that provides-an interface between user and hardware and also provides platform for application software to run.
1.5(B) In time sharing OS the time is divided into different sessions for different users and tasks.
1.6(A) Backspace key deletes the character present on left side of the cursor.
1.7 (A) Ctrl + Page Up takes the cursor to beginning of previous page and Ctrl + Page Down takes the cursor to beginning of next page.
1.8(C) Custom animation and slide transition options are present in Slide Show menu.
1.9(D) Automatic calculation, updating of calculated values, applying formulae and functions are some of the advantages of spreadsheet.
1.10(B) E-mail can be sent to multiple users at the same time but instant messaging and chart rooms can also be thought of as communicating simultaneously, however you have to select on user at a time to send the message.
TRUE / FALSE (O Level Solutions)
Ans. 2
2.1(T) 1 byte is equal to 8 bits thus a 16 bit computer can process 2 bytes at one time.
2.2(T) a multiplexer or mux is a device that performs multiplexing; it selects one of many analog or digital input signals and outputs that into a single line.
A demultiplexer (or demux) is a device taking a single input signal and selecting one of many data-output-lines, which is connected to the single input. A multiplexer is often used with a complementary demultiplexer on the receiving end.
2.3(T) An EPROM, or Erasable Programmable Read-Only Memory, is a type of memory chip that retains its data when its power supply is swithed off. In other words, it is non-volatile.
2.4(T) Disk partitioning is the creation of separate divisions of a hard disk drive using partition editors. Once a disk is divided into several partitions, directories and files of different categories may be stored in different partitions.
2.5(F) Audio output device can output any type of sound or audio file.
2.6(F) Mnemonics are associated with 2nd generation assemble language.
2.7(T) MEM is used to display memory of computer and CLS is used to clear the screen.
2.8(F) Dates can also be used for calculations in spreadsheets.
2.9(F) Linux is an Open Source operating system software
2.10(T) In computing, the Kernel is the central component of most computer operating systems. Its responsibilities include managing the system’s resources (the communication between hardware and software components).
MATCHING THE COLUMNS (O Level Previous Year Solutions)
Ans. 3
3.1(E) Scandisk checks hard disk for logical and physical errors.
3.2(F) Text replacement, Replace as you type or Auto Correct is a software-function commonly found in word processors such as Microsoft Word. Its principal purpose is to correct common spelling or typing errors, saving time for the user. It is also used to automatically format text or insert special characters by recognising particular character usage, saving the user from having to use more tedious functions.
3.3(H) It is the main circuit board of a microcomputer.
3.4(I) In telecommunications, RS-232 (Recommended Standard 232) is a standard for serial binary data signals connecting between a DTE (Data Terminal Equipment) and a DCE (Data Circuit-termination Equipment). It is commonly used in computer serial ports.
3.5(O) The display resolution of a digital television or computer display typically refers to the number of distinct pixels in each dimension that can be displayed.
3.6(B) A nibble is half byte or collection of 4 bits.
3.7 (G) a device driver or software driver is a computer program allowing higher-level computer programs to interact with a hardware device. A driver typically communicates with the device through the computer bus or communications subsystem to which the hardware is connected. When a calling program invokes a routine in the driver, the driver issues commands to the device. Once the device sends data back to the driver, the driver may invoke routines in the original calling progra. Drivers are hardware-dependent and operating-system-specific. They usually provide the interrupt handing required for any necessary asynchronous time-dependent hardware interface.
3.8(M) In absolute reference a $ is placed before column name and row number to make both of them fixed.
3.9(L) Memory is the amount of disk storage in computer.
3.10(J) It refers to time delays.
